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Errors using robot_monitor

GUI doesn't come up or stays empty

If you see something like:

Unable to register with master node [http://localhost:11311/]: master may not be running yet. Will keep trying.

GUI Turns Gray Frequently

When the robot_monitor turns gray, it means that it doesn't hear from the /diagnostics_agg topic.

rostopic info diagnostics_agg 

rostopic echo diagnostics_agg

Try contacting the Master and make sure that you can ping the robot.

2020-02-22 13:07